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Video Petrol Injection 1
Video Petrol Injection 2
Video Petrol Injection 3
Video Petrol Injection 4
Video Petrol Injection 5
Video B-Dir. Combustion
Video Dir. Petrol Injection 1
Video Dir. Petrol Injection 2
Video Dir. Petrol Injection 3
Video Dir. Petrol Injection 4
Video Dir. Petrol Injection 5
Video Petrol Injection Kugelf.
Video Homog. Working
Video Stratified-charge Oper.
Video Fuel Distrib.
Video Induction System
Video Petrol Injection Signal 1
Video Petrol Injection Signal 2
Video Idle Speed Device
Video Mass Air Flow Sensor 1
Video Mass Air Flow Sensor 2
Video Mass Air Flow Sensor 3
Video System Press. Reg. 1
Video System Press. Reg. 2
Video Injection Valve
Video Ind. Pulse Generator
Video Single Point Injection 1
Video Single Point Injection 2
Video Single Point Injection 3
Video Single Point Injection 4
Video Unregistrated Air
Video Lambda Sensor 1
Video Lambda Sensor 2
Video Lambda Sensor 3
Video Lambda Sensor 4
Video Lambda Sensor 5
Video Thermo Time Switch
Video Side-channel Pump
Video Peripheral Pump

Video First Fuel Pump
Video Petrol Injection Pump
Video D-Jetronic (MPI)
Video K-jetronic
Video KE-jetronic
Video KE-Jetroncic - Test, Diagn.
Video L-jetronic
Video LE-jetronic
Video LE-motronic
Video LH-jetronic
Video Vol. Air Flow Sensor
Video Idle Speed Device
Video Aux. Air Valve
Video Thermo Time Switch
Video Roller Vane Pump

Video Petrol injection 1
Video Petrol injection 2

          A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

  Direct Petrol Injection
     (combustion chamber)


There are manufacturers who have scrapped their 5-valve engines after the arrival of the direct fuel injection. Apparently this seems to require more space in the cylinder head. Now the injector-valve must be also accommodated - of course almost always in a central position.


Assuming we have two 2 intake ports per cylinder from the right. This engine obviously works continuously with a homogeneous mixture, because there are no flaps causing swirl. The inducted air is directed along the cylinder wall and diverted past the piston, thus the swirl reaches the spark plug where previously fuel was injected.The above figure shows impressively, particularly in the enlargement, the limited space in the cylinder head. Very small roller cam followers with an even smaller valve clearance offset provide for camshafts lying further outside. Between, obviously, two cylinder head covers, an oil-free area remains for the assembly of spark plug and injector. Thereby, the hollow cavities in the cylinder head have been, to a great extent exhausted. Thus the spark plug opening continues upwards, not straight, but sloping from the centre. This makes the assembly using a socket-wrench, just about possible. Interesting are also the remaining cooling channels in the cylinder block which are even tapered towards the bottom according to the amount of cooling needed.               Top of page               Index
2001-2015 Copyright programs, texts, animations, pictures: H. Huppertz - E-Mail
Translator: Don Leslie - Email:

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